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[Bug c++/35396] possible incorrect optimization due to missed dependency
- From: "hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Jul 2008 19:00:30 -0000
- Subject: [Bug c++/35396] possible incorrect optimization due to missed dependency
- References: <bug-35396-15844@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from hjl dot tools at gmail dot com 2008-07-07 19:00 -------
The testcase is invalid. Please try
#define DECL_CMPSWP(S,T,X) \
static inline T machine_cmpswp##S (volatile void *ptr, T value, T comparand ) \
{ \
T result; \
\
__asm__ __volatile__("lock\ncmpxchg" X " %2,%1" \
: "=a"(result), "=m"(*(T *)ptr) \
: "q"(value), "m" (*(T *)ptr), "0"(comparand)); \
return result; \
}
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35396